“Today a coalition of twenty-seven organizations released a joint letter to the World Wide Web Consortium (W3C), the Web’s standards-setting body, condemning Encrypted Media Extensions (EME). EME is a proposal to incorporate support for Digital Restrictions Management (DRM) — the systems used by media and technology companies to restrict watching, sharing, recording, and transforming digital works — into HTML, the core language of the Web.”

What is so hard to understand that EME is in no way against Open Source? It will not destroy the open source community now will it control illegal websites or people who do not want to pay for their entertainment.
It will only help companies who legally distribute Hollywood content to create cross plattform interoperable and consumer friendly platforms. Agreed, DRM had its flaws, but concepts like ultra violet could work. Apple users don’t complain about DRM in their films either…
And it means Digital RIGHTS Management. As the right of freedom of speech, producers of content have rights to distribute and sell. It’s further the right for artists to sell and survive that way. I think it’s more of a moral question. The definition of the R in DRM makes a big difference on how you perceive DRM…

In the context of EME the “R” in DRM is about technical restrictions. And these technical restrictions in practice contain not only restrictions regarding the Content Decryption Module (CDM) but also regarding the browser and the whole operating system.